Surgery is usually the best fix for a severe heart valve disease. Different types of heart valve blockages can happen, and surgery is necessary to fix these problems. Your heart is split into four ...

DEAR MAYO CLINIC: My father is having issues with his aortic valve. He is 53 years old and was told he needs to have a valve replacement. I was reading that there are different types of valves. Can ...

Equipment for gas chromatography, liquid chromatography and mass spectrometry is complex, with multiple subsystems that control the flow of sample analyte, carrier gas and solvent fluids. The ...

The four valves of the heart allow blood to flow through the heart in the right direction. The valves open or close each time the heart beats. Problems with the heart valves can lead to palpitations, ...

The number of patients that need heart valve surgery is steadily increasing; however, the majority of available risk-prediction models are tailored for coronary artery bypass grafting (CABG) surgery ...